FR2612853A1 - SELF-RELEASABLE SWIVEL HOLD FOR THE IMMOBILIZATION OF A MOTOR VEHICLE ON A LOADING PLAN - Google Patents

Abstract

SELF-LOCKING SWIVEL SHIM. SWIVEL SHIM CHARACTERIZED IN THAT IT CONSISTS OF AN ARM 1 SWIVEL MOUNTED ON A SLIDING BODY 3 ALONG A GUIDING PROFILE 4, A DROP-DOWN ASSEMBLY TOWARDS AN ARC-TYPE SWIVEL SELF-LOCKING POSITION -BODY OF CONNECTING RODS THAT CONNECTS ARM 1 TO SLIDING BODY 3 AND OF A PIVOTING AXLE 2 COMPOSITE WITH LOWER END MACHINED IN LOCKING CAM 31 COOPERATING WITH THE UPPER SURFACE OF GUIDING PROFILE 4 FOR LPSONGITUDINAL IMMOBILIZATION OF THE BODY SLIDING 3 AND THE BRAKING OF THE ROTATING ARM, IT PIVOTING SHAFT 2 IS MECHANICALLY CONNECTED TO THE ARM BY AN ELASTIC TORSIONAL LINK PROVIDING A RETURN FORCE HOLDING IN THE LOCKING POSITION. THIS INVENTION IS INTERESTED IN INDUSTRIES MANUFACTURING VEHICLE, ROAD OR RAIL CONVEYORS.

Description

The present invention relates to a hold

  adjustable and self-locking swivel for

  the use of a motor vehicle by its wheels on a

Loading plan.

  Numerous securing devices and wedges used for the immobilization of a vehicle are known

on a car transporter convoy.

  It is first of all retractable wedges to

ter on the raceway.

  These holds present a support plan

  corn. They have a sole equipped with a structure

  coming to rest in the perforations

of the raceway.

  Although lightweight, these holds are not practical because they are flat, projections on the raceway and sources of noise when

empty running.

  Moreover, they must be maneuvered individually and, in many cases,

  because of the disparity of loads.

  Other holds are of the folding type along

of the raceway.

  Unfortunately, to move them, it is necessary to unhook them to hang them to structures

neighbors spaced regularly.

  The ease of attachment to any

  place along the roadway is not

  ree. In addition, the pivoting wedges require support structures and rotational locking which prove complex and, therefore, provide a surplus value too important for the only ease

  of use presented by the pivoting nature of the hold.

  Finally, the solidity can not be guaranteed

  with heavy and difficult to manufacture

  quer. The present invention aims to remedy

these disadvantages.

- 2 - 5

  For this purpose, it relates to a self-locking pivoting wedge for the immobilisation of a

  vehicle by its wheels on a load plan-

  characterized in that it is composed of an arm pivotally mounted on a sliding body along a guide profile, a folding assembly to a pivoting self-locking position of the bracing type rod assembly which connects the arm to the sliding body and a lower machined pivot axis machined at a locking cam cooperating with the upper surface of the guide section for the longitudinal immobilization of the sliding body on the guide section and the braking of the arm

  rotation, said pivot axis being mechanically connected

  on the arm by an elastic torsion connection

  as a restoring force holding in the locking position. The advantages inherent in the pivoting wedge according to the invention are already numerous. We can

  enumerate several below, in a non-limita-

  tive: Longitudinal lock at any location;

  self-locking from a certain pivoting

  25. It becomes unnecessary to place the wedge precisely in one place to ensure the wedging;

  the hold is mounted mobile but inseparable from the

  edge for its warranty against loss and theft and

  the elimination of noise during idling.

  Technical characteristics and others

  advantages are recorded in the following description,

  by way of nonlimiting example in one embodiment with reference to the accompanying drawings, in which: FIG. 1 is a general perspective view of the

  pivoting wedge according to the invention in the interposition

  mediate on a raceway in front of a wheel to immobilize; Figure 2 is a perspective view of the pivoting wedge according to the invention in locked position through a raceway; Figure 3 is a vertical sectional view through the two raceways or rolling lines constituting the loading plane; Figure 4 is a longitudinal sectional view of the pivoting wedge according to the invention, mounted on a raceway;

  10. FIG. 5 is a detail view in longitudinal section.

  dinal of the pivot axis and the sliding body on which it is mounted; Figure 6 is an elevational view of the pivot axis and the entrance of the sliding body; 15. Figure 7 is a schematic view of the guide structures of the sliding body mounted on the guide section; Figure 8 is a perspective view illustrating the relief of the locking cam fitted to the lower end of the pivot axis; FIG. 9 is a perspective view of the end

  of the pivot axis above the guide rail.

  dage; Figure 10 is a side view of the sliding body mounted on the guide profile; FIGS. 11, 12, 13 and 14 are series of schematic plan views respectively of the cam of FIG.

  blocking plan view then in section and configura-

  the wedge and the position of the end of its arm on the opposite edge profile, in the following four positions: - folded - intermediate - locking catch

- stalling.

  The inventive general idea of the pivoting wedge described above is to mount a pivoting arm on a sliding body along an edge profile, to machine the end of the pivot axis in a cam locking the sliding body on the edge profile, the pivoting arm occupying a working position

  self-locked by an arch of bells.

  The self-locking wedge according to the invention consists of a pivoting arm 1 capable of movements of angular displacement around a pivot axis 2 carried by a sliding body 3 along a guide section such as 4, of general shape. for example diamond, equipping the outer longitudinal edges 5 and 6 of each raceway or rolling line 7 or 8. It is understood that the sectional shape of the guide section 4 can vary within the limits of equivalent means c ' that is to say insofar as it allows the sliding of the body 3 and its immobilization

longitudinal locking.

  We can thus consider round shapes,

  semi-circular, triangular or derived.

  In the description below, we will choose

  For example, the square section profile.

  This section, for example open section, is extended on the inside by a vertical wing return 9 serving as a protective rim to the guiding profile against impacts from the wheels of the vehicle to be transported. The set constitutes a border profile

  or 11 present on each side of the loading plan.

  The pivoting arm 1 is actuated by a

  a drawdown assembly consisting of a lever for

  12 is articulated to the arm by an axis 13 and biased on the body 3 by a mechanical connection. It ends with a

handle 14.

  The folding of this lever is limited

  stretching by an articulated locking link 15 by a first axis 16 to the operating lever 12 and a second axis 17 to the sliding body 3 so as to allow the total disengagement of the arm in a position parallel to the raceway and

  ensure self-locking in the stall position.

  This drawdown assembly is formed of a

  bracing connecting rods performing the function of self-

  locking. Indeed, after crossing the position

  alignment of the axes 13, 16 and 17, shown in

  tilted, the drawdown assembly is in the self-locking configuration.

  The lengths of the lever arms are calculated

  such as the configuration of auto-

  locking corresponds to the pivoting position of the pivoting arm, substantially perpendicular to the raceway to provide lateral stability to the vehicle. The sliding body 3 consists of a plate 18 extended downwards at each of its ends by guiding and gripping structures made of machined parts, for example, at one end, in the form of claws 19 and 20, for the part located under the axis of pivoting 2. These claws each have, at the end, an inclined plane 21 and 22 adapted to come into blocking contact with the lower adjacent faces facing the guide section 4 with a square section. as shown in Figures 6 to S. The opposite end carries the hinge axis 17 of the locking rod 15. It is shaped in underside splint 23 having two opposite parts 24 and 25 in the form of jaws fixed in inclined ramps 26 and 27 facing opposed inclined planes 2S and 29 for holding the body 3 on the guide section 4 in close contact with

  sliding along the entire length of said profile.

  The pivot axis 2 is a stepped shaft mounted on the sliding body 3 abuts by its shoulder 30. As shown in detail in FIG. 5,

  axis 2 ends in the lower part by one end.

  machined mite locking cam 31 called to cooperate

- 6 - 85

  With the upper dihedral of the guide section 4 in order to achieve, together with the thrust reaction of the folding assembly, immobilization by locking the sliding body 3 on said guide section 4 and the abutment of the 2 axis in rotation. The axis 2 is extended upwards by a cylindrical bearing 32 terminated by a threaded end 33. On the bearing 32 is enfi lled a return sleeve 34 of rubber or similar material providing an elastic mechanical connection between the axis 2 and the pivoting arm 1. This sleeve provides a torsionally resilient restoring force used for maintaining self-locking. The return sleeve 34 is enclosed in an outer cylindrical cage 35 and mounted by its inner surface directly or by means of a bushing 36 on the bearing surface 32. The cage 35 is delimited by an outer casing 37 forcibly fitted into a cylindrical cavity 38 crossing the end

articulated 39 of the pivoting arm.

  The sleeve 34 is simply fitted directly or by its sleeve on the bearing surface 32 and forced into deformation by an adjustable axial pressure assembly 40 exerted for example by a

  nut-washer 41 mounted on the threaded end 33.

  This has created a play catch and an adjustment of the torsional elastic restoring force which makes it possible to modify the angular position of action and the

  value of the self-locking force.

  The lower end of the pivot axis 2, machined in the form of a cam l31, has two reliefs

  symmetrical opposites, for example pyramid-shaped projections

  42 and 43 intersecting inclined contact planes 44, 45 and 46, 47 corresponding in pairs in tilt with the adjacent faces of the upper dihedral 4S of the guide profile. These planes are appropriately spaced angularly to bring, when the cam is at the beginning of overlap on the upper dihedral 4S of

  guide section 4, the offset necessary for

  then contacting ramps and inclined underside planes facing those of claws 19 and 20 and adjacent flanks of said guide section 4 for the longitudinal locking of the body 3 thereon

(Figures 8 and 9).

  As shown in FIG. 3, the loading plane has a symmetrical structure comprising on each side the outer edge profiles 10 and 11 and, in the central zone, two inner profiles of

  border 49 and 50 separated by stiffening ribs

cation 51 and 52.

  The internal edge profiles 49 and 50 ensure the guidance of the wheels of the vehicle but also the vertical support for the free end of the pivoting arm

of the hold.

  The differences will now be explained in detail.

  annuity phases of operation of the pivoting wedge

according to the invention.

  From a folded position of release-

  stall a wheel 53 of one of the

vehicles to be transported.

  In the disengaged position (FIG. 11), the body 3 is not immobilized on the guiding section 4. It is freely slidable along the guide profile into an approximate wedging position in which the pivot axis 2 is brought to trial at the

height of the front of the tire.

  The arm is then pivoted by action on the lever 12 (FIG. 12). From a certain angle of rotation relative to the disengaged position, one of the pyramidal projections forming the relief of the locking cam 31 of the end of the pivot axis 2 comes into contact with the upper dihedral 4S of the profile 4 and causes the blocking of

  the pivot axis 2. Then starts a wedge phase

  which will end with the longitudinal locking of the sliding body 3 on the guide profile 4, followed by

  immediately by self-locking (Figures 13 and 14).

  Thus, the continuation of the pivoting makes getting closer

  simultaneously the inclined planes 21 and 22 of the sub-

  faces facing the guide profile. In this way, we first catch up with the vertical games needed for

  free sliding of the body 3 on the guide section.

  Continued pivoting rapidly causes complete longitudinal locking of the sliding body 3 in the longitudinal position on the one hand by increasing the support and clamping force provided by the locking relief of the cam 31 at the lower end of the axis 2 and, secondly, by the thrust reaction of the folding assembly due to the elastic force of

  booster boosted by the pressure of the tire on the hold.

  This thrust reaction is an oblique lateral force which causes the sliding body 3 to become entangled.

the guide profile 4.

  Indeed, the totality of the longitudinal force of the wheel on the hold will be transmitted to the body

  sliding 3 by the draw assembly for provoking

  the self-anchoring of the body 3 which adds to the initial pinching force for the complete blocking of the body

sliding 3.

  In this way, a self-locking mechanism

positive.

  The body of the rubber sleeve 34, solidified

  of arm 1 and axis 2, constituting a connection

  elasticity of movement transmission between these

  ments, the continued rotation, immobilized axis 2, must be absorbed by the elastic deformation

sleeve 34.

  From a certain angle, when the corner

  longitudinal blocking starts, the elastic force

  retaining tick provides better maintenance of the

  rust because constituting an elastic return to the

  balance position of the lock.

  At the angular displacement corresponding to the alignment of the articulation axes 13, 16 and 17 of

  the drawdown assembly, we exceed the equi-

  free of this mechanism (Figure 14, position shown in dashed lines) beyond which the folding assembly tilts in the self-locking position (Figure 14) and is held stably in this position by the elastic return force of the sleeve 34, equilibrium point beyond which the sliding body 3 is

  locked longitudinally on the guide rail 4.

  This constraint results from the locking stop of the cam 31 on the upper dihedral 48 of the guide section 4 from a determined angular displacement, resulting from the angular offset of the faces of the projections of the cam 31. In fact, the axis 2 being immobilized, any additional angular deflection must be absorbed by the elastic deformation of the

return sleeve 34.

  This elastic return improves the stability of the folding mechanism in the locking position, because it constitutes a permanent force back to the

locked equilibrium position.

  This elastic restoring force is adjustable by the axial pressure assembly 40, for example by

nut-washer assembly 41.

  It is understood that the invention can not be limited to the means described above but rather that it embraces all variants and

modifications without inventive contribution.

- 1 C -

Claims (6)

  1. Self-locking swivel wedge for the im-   mobilization of a motor vehicle on a loading surface characterized in that it consists of an arm (1) pivotally mounted on a sliding body (3) along a guide section (4), a assembly for folding to a self-locking pivoting position of the connecting rod end type which connects the arm (1) to the sliding body (3) and of a machined lower end composite pivot axis (2) blocking (31) cooperating with the upper surface of the guide profile (4) for the longitudinal immobilization of the sliding body (3) on the guide profile and the braking of the arm   rotation, said pivot axis being mechanically connected   on the arm by an elastic torsion connection   as a restoring force holding in the locking position. 2. Swivel wedge according to claim 1 characterized in that the general sectional shape of the guide profile is a rhombus higher dihedron (4S) directed upwards.   3. Swivel wedge according to claims 1   and 2 characterized in that the lower end of the pivot axis is machined in two opposite symmetrical projections (42) and (43) with inclined contact planes (44, 45) and (46, 47) corresponding in pairs. tilting with adjacent faces of the dihedron   upper (4S) of the guide profile (4).   4. Swiveling wedge according to the claims   previous characterized in that the elastic torsion connection is a rubber sleeve (34) enclosed in an annular cylindrical cage (35) delimited by an inner surface (36) and an outer casing (37) forcibly fitted into a cavity (3So). cylindrical through the articulated end of the swivel arm and into   the inner surface is constrained by 26128 & 53 - ii -   mation by an adjustable set of axial pressure (40)   mounted on the threaded end of the pivot axis.   Swivel wedge according to claims 1,   2 and 3 characterized in that the sliding body (3) consists of a plate (18) and two ends on which are mounted on the one hand the pivot axis (2) and on the other hand the axis (17), each with its own   underside of guiding and squeezing structures   to maintain the body (3) on the guiding profile.   (4) in close sliding contact and to achieve the longitudinal locking of the sliding body on said guide profile.   6. Swivel wedge according to claim 5 characterized in that the end bearing the axis (17) is formed as a splinted underside (23) having two opposite parts (24) and (25) in the form of fixed jaws. in inclined ramps (26) and (27) facing opposing inclined planes (2S) and (29) for maintaining sliding of the body (3) on the profile of guiding (4).   Swiveling wedge according to claim 5 characterized in that the end bearing the pivot axis (2) has in the sub-face two claws (19) and (20) arranged, in the mounted state, facing the adjacent lower faces of the guide profile (4) to come into blocking contact with them by the mounting of the sliding body (3).   x shim according to claim 1, characterized   in that the folding assembly in the auto-position   locking consists of an operating lever (12) articulated to the pivoting arm (1) by an axis (13), lever biased on the sliding body (3) by a locking rod (15) articulated by a first axis (16). ) to   lever and by a second axis (17) to the sliding body.